import type { Metadata } from "next";
import Link from "next/link";
import { ArrowRight } from "lucide-react";
import { SiteFooter } from "@/components/marketing/site-footer";
import { SiteHeader } from "@/components/marketing/site-header";
import { Button } from "@/components/ui/button";
import { NO_INDEX } from "@/lib/seo";

// A 404 already carries the right status code; the meta tag is belt-and-braces
// for crawlers that reach this shell through a soft link.
export const metadata: Metadata = { title: "Page not found", ...NO_INDEX };

/** Popular destinations, so a bad URL still routes the visitor somewhere useful. */
const LINKS: [string, string][] = [
  ["Features", "/features"],
  ["Pricing", "/pricing"],
  ["FAQ", "/faq"],
  ["About", "/about"],
];

export default function NotFound() {
  return (
    <div className="flex min-h-screen flex-col">
      <SiteHeader />
      <main className="flex flex-1 items-center bg-hero-wash">
        <div className="container max-w-2xl py-24 text-center md:py-32">
          <p className="text-[13px] font-semibold uppercase tracking-[0.04em] text-brand">
            Error 404
          </p>
          <h1 className="mt-3 font-display text-5xl font-extrabold tracking-tight md:text-6xl">
            We couldn&apos;t find that page
          </h1>
          <p className="mx-auto mt-4 max-w-lg text-lg text-muted-foreground">
            The link may be broken, or the page may have moved. Here are a few places to
            pick things back up.
          </p>

          <div className="mt-9 flex flex-col justify-center gap-3 sm:flex-row">
            <Button asChild size="lg">
              <Link href="/">
                Back to home <ArrowRight className="h-4 w-4" />
              </Link>
            </Button>
            <Button asChild size="lg" variant="outline">
              <Link href="/sign-up">Start free</Link>
            </Button>
          </div>

          <nav aria-label="Popular pages" className="mt-12">
            <ul className="flex flex-wrap justify-center gap-x-6 gap-y-3 text-sm">
              {LINKS.map(([label, href]) => (
                <li key={href}>
                  <Link href={href} className="font-semibold text-brand hover:underline">
                    {label}
                  </Link>
                </li>
              ))}
            </ul>
          </nav>
        </div>
      </main>
      <SiteFooter />
    </div>
  );
}